28 February 2012
⇐20120227 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120229⇒

NOAA
4 Active Regions
11423
11424
11425
11426

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W27S64
(191",-820") 		E78-W64
(142) 		3.2 0.9 3.4e33
2 E24S24
(-361",-295") 		E30-E14
(16) 		1.1 -1.9 -6.1e32
3 W09N15
(144",364") 		W02-W13
(11) 		0.3 -34.7 -2.4e33
4 E08N31
(-109",600") 		E11-E03
(8) 		0.2 -5.9 -3.8e32

Note: Solar Monitor's coronal hole segmentations are performed by CHIMERA, a copy of which is available at: github.com/TCDSolar/CHIMERA.

The operations of the CHIMERA algorithm is described in a peer reviewed paper: arxiv.org/abs/1711.11476.

An extensive copy of coronal hole properties are available at: solarmonitor.org/data.

The latest positions of the coronal holes are given in heliocentric co-ordinates, and the region positions are valid on 28-Feb-2012 20:00 UT .